Gee, and I always thought that I was a paying customer, not a "grubbing, groveling wannabe." It's nice to know that my business is valued so highly by the people who's salary is paid, in part, by my salary.
I can only imagine (hope) that you are a young, immature person who has yet to learn the value of cheerfully providing quality customer service that is the backbone of most any business. If you are more mature then I sincerley pity you.
Do yourself a favor and get out of this line of work before you do some real damage; you won't last long with your attitude anyway.